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Electrochemical investigation of intramolecular electronic interactions in substituted nitrobenzens
Liška, A. ; Ludvík, Jiří
This research represents the first part of the electrochemical study of nitrocalixarenes. The title compounds represent thus the "monomeric" fragments and their models. The electrochemical reduction of aromatic nitrocompounds in non-aqueous media proceeds generally in two steps: one-electron reversible formation of radical anion and three-electron reduction to the hydroxylamine. In this work, however, four other different mechanisms of electroreduction of aromatic nitrocompounds are presented and the influence od p-substituents on the reduction pattern are discussed.
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Participation of electrochemistry in the studies of human metabolism
Navrátil, Tomáš ; Šenholdová, Z. ; Přistoupilová, K. ; Přistoupil, T. I. ; Heyrovský, Michael ; Pelclová, D. ; Žák, J.
The contribution deals with explanation of metabolism of long term supplemented creatine in human organism. This process differs from metabolism of natural endogenous creatine, which is excreted in form of creatinine. Exogenous creatine induces increase of peptide formation, of body mass, and of intracellular fluid.
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Determination of herbicide dinoseb with amalgam and carbon electrodes
Fischer, J. ; Barek, J. ; Pecková, K. ; Zima, J. ; Kücükkolbasi, S. ; Ersöz, M. ; Kara, H. ; Josypčuk, Bohdan ; Navrátil, Tomáš
Dinoseb, systematically 2-(1-methylpropyl)-4,6-dinitro-phenol, is phenolic, commonly used herbicide and insecticide. Dinoseb has two very easy reducible nitro-groups in its structure and one electrochemically oxidizable hydroxy group. Differential pulse voltammetry was applied for its determination in water. The nitro group reduction was used for voltammetric determination with hanging mercury electrode (HMDE), mercury film electrode (MFE) and modified carbon paste electrode (MCPE) and carbon paste electrode (CPE) as well as meniscus modified silver solid amalgam electrode (m-AgSAE).
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